NASA’s mission is to send humans back to the Moon, Mars, and
Beyond! In order to do that, we need to fully understand the effects
of spaceflight on humans. A trip to Mars will take at least thirty months,
or two and a half years. During that time, humans will be exposed to
the dangers of space travel, including a weightless environment and
increased radiation. In this section you will learn about the kinds
of experiments that NASA’s life scientists conduct.